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[prawn]

It creates/enables inertia rather than locks you in, I think that's what they're saying.

[ryanmarsh → prawn]

Inertia a.k.a. reasons for people to like and therefore stick with your product. How dare they.

[prawn → ryanmarsh]

No, it's clearly different to that, and to pure lock in. (And I wasn't offering judgement either way, just trying to help explain the other comment.)